Continuity mistake: Roz is at Cafe Nervosa, sitting with Marty, pretending to be his date. In one shot her hand is covering his, in the next shot her hands are in her lap - but in the next shot, her hand is back covering Marty's.
Continuity mistake: Frasier is hiding behind the kitchen counter when Ronee comes in - followed by Marty. Frasier puts his hands, one holding an apple, up on the counter. In the next shot the apple is on the counter, and his hands are draped over each other - without enough time for natural movement.
Continuity mistake: When Martin and Frasier are in Cafe Nervosa and Marty is lecturing his son about eavesdropping, his newspaper moves a few inches, from being on his left to being right in front of him, even though he never touched it.
Answer: It equals the record of James Arness of "Gunsmoke" for the actor who's played the same part on TV NOT in a soap opera. If you include soaps there are two main contenders - William Roache, who's been playing Ken Barlow in "Coronation Street" in the UK since 1960. Don Hastings has been playing Robert Hughes in US soap "As the World Turns" since 1960 as well.